In this episode, the back room of the courthouse where Barney conducts his séances, has no back door to the outside. In a couple scenes, the wall that normally holds the door to the alley outside instead has a jail cell window at the top of the wall and no door. This window is complete with vertical iron bars and a very thick, sloping sill just like the windows in the jail cells.
The book Barney is reading after Opie's first wish comes true is titled "Psyhic Phenomena" instead of Psychic Phenomena.
In the final scene Andy lays a card on top of another and says they match, being "two unicorns". However, the two cards are clearly different.
When Goober and Barney and Floyd are sitting in the back room of The Courthouse for the séance, the light from the oil lamp is suppose to be the only light source in the room. However, the light behind them stays solid and does not flicker.